-89.08% is the change from 824 to 90
Calculation steps:
[( 90 - 824 ) ÷ 824] x 100 = -89.08%
Formula
Percentage change = [(90 - 824) / 824] x 100
Subtract the new number by the original number
90 - 824 = -734
-734 ÷ 824 = -0.8907766990291263
-0.8907766990291263 x 100 = -89.08%